Tests of Stellar Models Using Four Extremely Massive Spectroscopic Binaries in the R136 Cluster

Details Tests of Stellar Models Using Four Extremely Massive Spectroscopic Binaries in the R136 Cluster Tests of Stellar Models Using Four Extremely Massive Spectroscopic Binaries in the R136 Cluster

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8217m&link_type=abstract

HST Proposal ID #8217

Physics

Hst Proposal Id #8217 Hot Stars

Scientific paper

We are proposing to observe four non-interacting double-lined spectroscopic binaries discovered in the R136 cluster by our Cycle 6 FOS spectroscopy {Massey & Hunter 1998, ApJ, 493, 180}. These binaries are all of very early type {O3-4 + O3-8} and should prove to be of very high mass. These data will allow us to extend the empirical mass-luminosity relation to higher masses, providing crucial checks on stellar interior and atmosphere models. Examination of the WFPC2 archives reveals that at least three of the four systems undergo eclipses. We plan to obtain simultaneous spectroscopy and photometry for all four systems during a single 2-orbit visit. Fourteen such visits, over an interval of a few weeks, should provide direct measurements for the masses of eight of the highest mass stars ever analyzed.

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